docs: def write_image(self, img, extname=None, extver=None,
                      compress=None, tile_dims=None, header=None):
          """
          Create a new image extension and write the data.
  
          parameters
          ----------
          img: ndarray
              An n-dimensional image.
          extname: string, optional
              An optional extension name.
          extver: integer, optional
              FITS allows multiple extensions to have the same name (extname).
              These extensions can optionally specify an EXTVER version number in
              the header.  Send extver= to set a particular version, which will
              be represented in the header with keyname EXTVER.  The extver must
              be an integer > 0.  If extver is not sent, the first one will be
              selected.  If ext is an integer, the extver is ignored.
          compress: string, optional
              A string representing the compression algorithm for images,
              default None.
              Can be one of
                  'RICE'
                  'GZIP'
                  'GZIP_2'
                  'PLIO' (no unsigned or negative integers)
                  'HCOMPRESS'
              (case-insensitive) See the cfitsio manual for details.
          header: FITSHDR, list, dict, optional
              A set of header keys to write. Can be one of these:
                  - FITSHDR object
                  - list of dictionaries containing 'name','value' and optionally
                    a 'comment' field; the order is preserved.
                  - a dictionary of keyword-value pairs; no comments are written
                    in this case, and the order is arbitrary.
              Note required keywords such as NAXIS, XTENSION, etc are cleaed out.
  
  
          restrictions
          ------------
          The File must be opened READWRITE
          """
  
          self.create_image_hdu(img,
                                header=header,
                                extname=extname, extver=extver,
                                compress=compress, tile_dims=tile_dims)
  
          if header is not None:
              self[-1].write_keys(header)
              self[-1]._update_info()